Turret-lathe.



fm.7e0,|4s. I Patented May 13,1902,

.|. P. LAVIGNE.

TURBET LATHE.

(Application 105. In. 16, 1901. Renewed Jan. 24, 1902.)

(lo Iqdal.) 4 smug-sheet maul lllll lwwimm Patented May I3, 1902.

J. P. LAVIGNE.

TUBRET LATHE. (Application filed Mar. 18, 1901. Rbnewad Jan. 24, 1902.)

4 Sheets-Sheet 2.

(No Model.)

No. 700,l46. Patented May I3, I902.

J. P. LAVIGNE. TURRET LATHE.

(Application filed. Mar. 18, 1901. Renewed Jan. 24, 1902.) (llo llodel.)4 Sheets-Sheet 3.

.TNE Nomus PETERS co. momu'mo" wnsumam. u. c.

" 2o alining the'same; Fig. 3, a view of the turret UNITED STATES JOSEPHP. LAVIGNE, OF NEW' HAVEN,

CONNECTIQUI}ASSIGNOR TO STAND- I vA nnsoanw 00., OF OI-IIOAGO,5IL-LINQIS, A CORPORATION.

- Tu RRETf-LATH 7 SPECIFICATION forrhingpart of Letters Patent No.7oo,'14o, dated May 13, 1902. Application filed Mathis. 1901. EmmaJanuary 24, 1902. Serial No. 91,065. (No model.)

T 00% whom it may concern:

Be it known that I, JOSEPH P. LAVIGNE, of New Haven, in the county ofNew Haven and State of Connecticut, haveinventeda newImeprovementin'Iurret-Lathes; and I do hereby declarefithe following,whentaken in connection with the accompanying drawings and the 1 charactersof reference marked thereon, to be a full, clear,and exact descriptionof the same,

10 and .Whichjsaiddrawings constitute part of v this specification,andrepresent, in-

Figure 1, a'view in side elevation of a turret-lathe constructedinaccordanoe with my invention; Fig. 2,'a broken;plan view of the turretend'o'f-the,machine' with the tool-holders removed from the turret;Fig.2 a view in vertical cross-section on the line a b of Fig.

2, showingthe means employed for taking up the wear of, theturret-lockingbolt and reend of the'machine in vertical longitudinalsectiongl ig.v 4:, a reverse plan view of the train employed forimparting step-by-step rotation to the turret, including the star wheel Fig. 5,a detached iew, in side elevation, of

the lever employed for retractingthe turret locking bolt; Fig. 6, aview, partly in vertical longitudinal section on the line a d otFig. 1,showing the speed-controllinginstrumentalities of the machine and themeans employed for cutting them out of action; Fig, 7, a detached brokenview in tr'ansverse'section on the line cf of Fig. 6; Fig. 8, a detachedview, partly in side elevationand partlyin verti- 3 5 cal section,showing the sliding clutch-block and the sliding collar-block of themachine; Fig. 9, a detached plan view of the sliding collar-block andthe levereinployedfor manually operating the same; Fig. 10, a detached40 broken view, in vertical section, showing a modification of theplanet-motion of my speedcontrolling instrumentalities.

My invention relates to an improvement in turret-lathes, the objectbeingto produce a' lathe particularly adapted for use in .theproduction ofI'nachine-screws and kindred objects and combining simplicity ofconstruction with convenience and durability in use.

With these ends in view my invention con- 0 sists in'a" machine havingcertain details of,

construction and combinations of parts, as

will be hereinafter described, and pointed out in the claims.

I In carrying out my invention as herein shown. I employ a turret-drum2, in the outer edge of which I insert several operating-pins 3, whichcoact with the short horizontallyarranged' arm at of a bolt-retractinglever 5,

swinging upon a horizontal stud 6, mounted in a bracket 7, secured byascrew 8 to the un- 6e der face of the turret-slide 9, which is reciprocated back and forth upon the machineframe 10. 'lhe under'face of the arm4 of the saidlever 5 is formed Witha lifting-bevel 11; and aiflatsustaining-surface 12, under which the pins ride to respectively tiltthe lever outwardly and maintain it in its tilted position. The upperend of the said lever 5 is furnished with'a knuckle-joint-like terminal13, entered into a vertical opening 14,

formed in. the reciprocating turret-locking boltl15, which is located ina long groove 37, formed-to receive it in the turret-slide 9, the innerend" of the said bolt being adapted to be entered into looking-slots 16,formed for its' reception in the locking-ring 17 carried by the turret18,,which is of any approved construction. The outer end'of the bolt 15is formed with a deep counterbore 19 for the reception of the inner endof a heavy spiral 8o spring 20, the inner endof which rests upon thebottom of the said counterbore 19 and the outer end of which'impingesagainst the arm 21 ofthe slide 9. Under this construction the spring 20constantly urges the bolt 15 inward toward the locking-ring 17 of theturret 'l8.'The engagement of one of the pins 3 with the [arm fioffchebolt retracting lever 5 willfcause the same to be tilted outwardly orretired, with theeflt'ect of moving the bolt 15 o outwardly away fromthe'ring 17 and against the tension of. the spring 20. This is theautomatic action of the bolt. -In case, however, it is desired toretract the "bolt man ually for. the unlocking ofthe turret; Lpro- 5vide the bolt with a handle 22, whic'h'is'secured to the outer end of along rod 23, pass ing through the arm 21 of the slide, through thespring 20, and through the cou'nterbore 19, and having'its extremeinnerend screwed to:

.into a threaded opening 24, leading out of the bottom of thecou'nterbore 19.

After one of the pins 3 has performed the wearof the bolt or re-alinethe same, the sup;

function of actuating the bolt-retracting lever 13 it immediatelyperforms the additional function of turnin g the star-wheel 25, which islocated at the lower end of a sleeve 26, mounted upon a heavy taperingstud 27, depending from the turret-slide 9, as clearly shown in Fig. 4.The upper end of the said sleeve 26 terminates in a pinion 28, meshinginto an intermediate pinion 29, journaled upon a stud 30, depending fromthe slide 9. The intermediate pinion 29 meshes into a driven pinion 31,located at the lower end of a long sleeve 32, which extends upwardthrough the turret 18, which with its related instrumentalities Iconsider it unnecessary to describe, as their construction is the sameor substantially the same as that shown and described in my priorpatent, No. 623,322, issued April 18, 1899.

I may here state that the sustaining-face 12 of the arm 4 of the lever 5operates to hold the lever 5 in its tilted position, in which the leverholds the bolt 15 in its unlocked position until after the pin 3 hasengaged with one of the arms of the star-wheel and moved the samesuiiiciently to start the rotation of the turret and carry the same farenough to move the slot 16 in the lockingring 17 of the turret, fromwhich slot the bolt 15 has just been retracted out of alinement with theinner end of the bolt, so as to cause the same to ride upon the surfaceof the said ring. If it were not for this slight actuation of thestar-wheel prior to the release of the lever 5 by the pin 3, the boltwould be shot by the spring 20 back into the slot 16 and relock theturret. The slide 9 is reciprocated back and forth by means of cams 33,which are secured to the said turret-drum 2, and which coact with anantifriction roll 34, formed upon the lower end of the heavy stud 27,before mentioned.

For the purpose of taking up the wear of the bolt 15, as well as for thepurpose of realining the same, I employ two tapering gibs 35 and locatethe same on opposite sides of the turret-locking bolt 15, as shown inFig. 2, in the spaces 37 37, formed between the opposite faces of thesaid bolt and the outwardly-inclined outer walls 36 36 of the deepgroove 37, formed in the slide 9 for the reception of the bolt. Thesegibs are narrower than the groove 37 is deep and are adjustablysupported above the bottom of the groove by-means of supporting-screws38 38, of which there is one at each end of each gib. The lower ends ofthese screws project through the lower edges of the gibs and support thesame, as shown in Fig. 2, as it were upon short legs. The said gibs areheld in place by means of pressure-screws 39 39, of which there is onefor each end of each gib, these screws being formed with overhangingheads, which enter shallow segmental notches 40, formed in the outeredges of the gibs near the ends thereof. If it is desired to take upporting-screws of one or both gibs are turned, so as to shorten theprojection of their lower ends and allow the gib or gibs to descendlower into the groove 37. After this adjustment has been affected thepressure-screws 39 of one or both gibs are turned inward correspondinglyto force the gib or gibs home. When the wear is even on both sides ofthe bolt, both gibs will be adjusted. When it is on one side only, onlyone gib will be ad- 3' usted. The bolt, gibs, and screws are closed inand protected by means of a cover 41, consisting of a flat platedovetailed into the top of the slide 9, the said plate being formed atits outer end with a handle 42, by means of which it is removed. Thesegibs, it will be observed, are not moved longitudinally in dischargingtheir functions, but are moved laterally in lines at right angles totheir longitudinal axes. Taking their cross-sectional form, as shown inFig. 2, into consideration, it might with propriety be said that thegibs are moved edgewise rather than endwise.

The turret-drum 2 is driven by the main shaft 43, the speed of which isvaried to regulate the speed at which the turret 18 is advanced towardand retired from the workholding chuck 44 by speed-controllinginstrumentalities of the same general character as shown and describedin my reissued Letters Patent No. 11,690, dated August 30, 1898. Thesaid shaft 43 is provided with a large gear-wheel 45, driven directlyfrom a wormpinion 46, located within a housing 47 and mounted upon atubular shaft 48, carrying at one end a fast pulley 49, upon which runsa power-belt (not shown) from any convenient source of power. ning uponthe pulley 49, the worm-pinion and hence the worm-wheel and the shaft 43are driven rapidly. For decreasing their speed as required when cuttingis being done the said belt is shifted to the slow pulley 50, which ismounted upon one end of a shaft 51, which passes through the tubularshaft 48 and is provided at its projecting opposite end with a cup 52,furnished with astud 53, upon which is mounted a pinion 54, which istherefore located eccentrically with respect to the center of the cupand the shaft 51. The said pinion 54 meshes into two gear-wheels 55 and56 simultaneously. The said wheels correspond in size, but aredifferentiated in the number of their teeth, the gear-wheel 55 havingone tooth less than the gear-wheel 56. The gear-wheel 55 is locatedwithin the cup 52 and fixed upon the adjacent end of the tu-' bularshaft 48, while the gear-wheel 56, which is also located within the cup52, .is loosely mounted upon the said end of the tubular shaft 51 andprovided with a hub 57, extending out of the cup 52 and formed withratchetteeth 58, which are engaged by a pawl 59, mounted upon theadjacent end of a rockshaft 60, which is journaled in the frame of thelathe and extends forward to a point near \Vhen the said belt is run-'than the wheel 55.

roams the pulleys 49 and 50,-where it is furnished with a handle 61, bymeans of which the shaft 60 may be rocked and thepawl 59 disengaged fromthe ratchet-teeth 58, whereby the differential gearing now beingdescribed may be entirely out out of action, as its performancepowerwill be communicated to the worm-' wheel 45 through the'shaft 51, thecup 52, the pinion 54, the gear-whee1s'55 56, and the tubular shaft 48,which is coupled with the gear-wheel 56 through the pawl 59; Throughthese instrumentalities the speed of thepulley 50 will be so reducedthat the gear-wheel 45 will move butvery slowly, for the reason that onecompleteorevolution of the shaft 51 and cup 52 will only rotate thetubular shaft 48 through a distance represented by one tooth of thegear-whee156,which has'one more tooth than the gear-wheel 55. In thisconnection it may be explained that as the cup 52 revolves andcarries-the pinion 54 with it the same will gain what is represented byone tooth on the wheel 55 during each revolution of the cup, because thepinion also meshes into the teeth of the wheel 56,which contains onemore tooth Thereforethe pinion 54 operates upon the wheel 56 as a pointof purchase to push the wheel 55 and turn the tubular shaft 48, thewheel 56 being prevented from turning by the pawl 59 and theratchetteeth 58, formed upon the hub 57 of the wheel 56. It .will beunderstood from the foregoing that when the pawl 59 is lifted out ofengagement with the ratchet-teeth 58, so as to leave the wheel 56 freeto turn-upon the tubular shaft 48, the differential-gear mechanismwillbe cutout of action. 7 The speed with which the. gear-wheel runsdetermines the speed of the shaft 43, which carries the turret-drum 2,the speed of which determines the speed with which the cuttinginstrumentalities of the turret 18 are advanced toward and retired fromthe work-holding chuck 44.. By mounting the pawl 59 upon a rock-shaft6.0 and furnishing the same with a handle 61 the differential gear maybe very readily cut out of action.

For thepurpose of converting the cup 52 into an oil-box I provide itwith a flanged annular or washer-like cap 62 (shown in Fig. 6) andsecured in placeby the stud 53, which it assists in'supporting. Itjalsoassists in supporting a stud 64, which may be used, if desired, inaccordance with the modification shown by Fig. 10, in which the pinion54 is dispensed with and the gear-wheels 55 and '56 replaced bydifferentiated gears 67 and-68, respectively meshing into differentiatedpinions 66 and 65. These gear-wheels 55'and 56 and gears 67 and 68 donot reduce the'speed as much as the pinion 54 and the gear-wheels '55and 56 and are designed to beused'when the machine is employedfor-cutting brass'or other soft metal, as compared with steel. It isobviously easier to change the'gears as described than to change thecams 33'on theturret-drum 2. The shaft 43 also carries a camvdrum 69,furnished with cams 70, which'operate the sliding feeding-block 71,- andwith cams 72, which operate the sliding cone-block 73,'both of which aremounted to slide upon a fixed horizontal stud-like shaft74, supported bythe frame of the machine. The sliding feeding-block 71 is formed in itsupper'end,

Fig. 8, with an oil-chamber 75, which receives a coupling-collar 76located upon the'rear end of the longitudinally-movable stock-feedingtube 77, which is otherwise of ordinary and in such rotation lubricatedby the running of the collar 76 in the oil of the oil-chamber 75aforesaid. The sliding clutch-block 7 3'is formed with a correspondingoil-pocket 78, receiving a collar 79, forming a part of the slidingclutch-cone 80, which is mounted upon the hollow spindle 80of themachine. This spindle is of ordinary construction and carries thework-holding clutch 44 atits forward end. Grooves 79 79, formed) onopposite sides of the collar 79, receive more or less oil, which islifted out of the oil-pocket 78 by means of the collar 7 9, whichrotates therein. When the clutch-cone 80 is moved from right to left,the thrust of its operation falls upon the shoulder a of the clutch-coneandupon the left-hand face a of the collar 7 9, between close together,which permits the'use of a relatively narrow drum 69, thus making themachine-more compact. Narrow drums in machines of this class aredesirable.- For the 'manual operation of the clutchfblock 73 I provideit with a bel'l-crank-operating lever.

81, as shown in Fig. 9, the short inner arm 82 of this lever havinguniversal-joint connectionwith a boss 83, formed upon one side of theblock, and the lever being pivotally mounted in a small bracket 84,mounted-in- The said lever 81 prothe machine-frame.

Vides Very convenient means for manually operating the block-73independent of the cams 22 upon the: drum 69.

The said main construction and which is frictionally rotated nished withshipper-cams 86, which operate the shipper which shifts the belt fromthe pulley 49 to the pulley 50, and vice versa, this shipper not beingshown. The said camwheel is also provided with cams 87, which operatethe shipper-lever arm 88, pivotally connected at one end to ashipper-lever 89, which operates a clutch 90, located between thepulleys 91 and 92, which control the driving of the spindle 80. For thepurpose of quickly sending the lever 89 to the limit of either of itstwo positions and forfirmly holding it therein Iprovide the upper edgeof the arm 88 with two shallow beveled notches 93 and 9a, which receivethe beveled lower end of a spring-actuated plunger 95, which coacts withthe walls of the said notches and forces the lever in one direction orthe other to the limit of its movement and holds it there.

It is apparent that in carrying out my invention some changes from theconstruction herein shown and described may be made, and I wouldtherefore have it understood that I do not limit myself thereto, buthold myself at liberty to make such departures therefrom as fairly fallwithin the spirit and scope of my invention.

Having fully described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a turret-lathe, the combination with the turret thereof, of meansfor imparting step-by-step rotary movement thereto, a locking-bolt forthe turret, a bolt-retracting lever for operating the said bolt inunlocking the turret, a drum, and pins mountedin the said drum andcoacting with the said lever and with the said rotating means which arearranged so that each pin operates successively upon the lever and thenupon the said rotating means.

2. In a turret-lathe, the combination with the turret thereof, of meansfor imparting step-by-step rotary movement thereto, includingastar-wheel, a locking-bolt for the turret, a bolt-retracting leverprovided with an arm, a drum, and pins mounted in the drum and coactingwith the said arm of the said lever for retracting the bolt andunlocking the turret, and then eoacting with the star- Wheel for therotation of the turret when so unlocked.

3. In a turret-lathe, the combination with the turret thereof, of meansfor imparting step-by-step rotary movement thereto,including astar-wheel, a locking-bolt for the turret, a bolt-retracting leverprovided with an arm formed upon its under face with a bevel and with aflat sustaining-surface, adrum,and pins mounted in the drum and coactingwith the said arm of the lever for retracting the bolt and unlocking theturret, and then coacting with the star-wheel for the rotation of theturret.

4.. In a turret-lathe, the combination with the turret thereof, of aturret-slide formed with a deep groove, a turret-locking bolt located inthe said groove, means for operating the said bolt, two tapering gibslocated in the said groove upon opposite sides of the said bolt,supporting-screws mounted in the said gibs, projecting below the loweredges thereof and resting upon the bottom of the said groove in whichthe gibs are raised or lowered by means of the said screws,. andpressure-screws mounted in the said slide and engaging with the gibs forforcing the samelat erally inward and holding them in place.

5. In a turret-lathe, the combination with the main shaft thereof, ofcnttinginstrumentalities driven by the said shaft, and differentialgearing connected with the said shaft for driving the same at varyingrates of speed, the said differential gearing including a revolving cuparranged in a vertical plane, a plurality of gears located within thesaid cup, an annular cap applied to the open end of the cup which itconverts into an oil-retaining cup, and one or more studs mounted in thecup and extending through the said cap which they hold in place andwhich in turn assist in supporting the said studs.

In testimony whereof I have signed this specification in. the presenceof two subscribing witnesses.

JOSEPH P. LAVIGNE.

Witnesses:

GEORGE D. SEYMOUR, LILLIAN D. KELsEv.

